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kubeadm: remove outdated notes during upgrade

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The notes printed to the user from common.go when
loadConfig fails are outdated and incorrect.
If the config cannot be loaded the user should not be instructed
to re-upload the config with kubeadm commands. Instead they
should do it manually with kubectl.

On loadConfig() error just wrap the error in a simple message
and show it to the user.

The current setup stomps missing IsNotFound errors for Node objects.
The underlying fetching of init configuration uses
the node object to construct an initconfiguration for this
upgrade process, so if the Node is missing the kube-config CM
will be reported as missing, which is incorrect.
This commit is contained in:
Lubomir I. Ivanov 2023-11-27 12:27:27 +02:00
parent ad9b60e2c9
commit f86249c68e
1 changed files with 2 additions and 16 deletions
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18
cmd/kubeadm/app/cmd/upgrade/common.go
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@ -25,8 +25,6 @@ import (
"github.com/pkg/errors"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/sets"
fakediscovery "k8s.io/client-go/discovery/fake"
clientset "k8s.io/client-go/kubernetes"
@ -37,7 +35,6 @@ import (
"k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/validation"
cmdutil "k8s.io/kubernetes/cmd/kubeadm/app/cmd/util"
"k8s.io/kubernetes/cmd/kubeadm/app/componentconfigs"
"k8s.io/kubernetes/cmd/kubeadm/app/constants"
"k8s.io/kubernetes/cmd/kubeadm/app/features"
"k8s.io/kubernetes/cmd/kubeadm/app/phases/upgrade"
"k8s.io/kubernetes/cmd/kubeadm/app/preflight"
@ -131,23 +128,12 @@ func enforceRequirements(flags *applyPlanFlags, args []string, dryRun bool, upgr
}
// Fetch the configuration from a file or ConfigMap and validate it
printer.Printf("[upgrade/config] Making sure the configuration is correct:\n")
_, _ = printer.Println("[upgrade/config] Loading the kubeadm configuration")
var newK8sVersion string
cfg, legacyReconfigure, err := loadConfig(flags.cfgPath, client, !upgradeApply, printer)
if err != nil {
if apierrors.IsNotFound(err) {
printer.Printf("[upgrade/config] In order to upgrade, a ConfigMap called %q in the %s namespace must exist.\n", constants.KubeadmConfigConfigMap, metav1.NamespaceSystem)
printer.Printf("[upgrade/config] Without this information, 'kubeadm upgrade' won't know how to configure your upgraded cluster.\n")
printer.Println()
printer.Printf("[upgrade/config] Next steps:\n")
printer.Printf("\t- OPTION 1: Run 'kubeadm config upload from-flags' and specify the same CLI arguments you passed to 'kubeadm init' when you created your control-plane.\n")
printer.Printf("\t- OPTION 2: Run 'kubeadm config upload from-file' and specify the same config file you passed to 'kubeadm init' when you created your control-plane.\n")
printer.Printf("\t- OPTION 3: Pass a config file to 'kubeadm upgrade' using the --config flag.\n")
printer.Println()
err = errors.Errorf("the ConfigMap %q in the %s namespace used for getting configuration information was not found", constants.KubeadmConfigConfigMap, metav1.NamespaceSystem)
}
return nil, nil, nil, errors.Wrap(err, "[upgrade/config] FATAL")
return nil, nil, nil, errors.Wrap(err, "could not load the kubeadm configuration")
} else if legacyReconfigure {
// Set the newK8sVersion to the value in the ClusterConfiguration. This is done, so that users who use the --config option
// to supply a new ClusterConfiguration don't have to specify the Kubernetes version twice,